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Article Dans Une Revue Physical Review Letters Année : 2003

Doped coupled frustrated spin-1/2 chains with four-spin exchange

Résumé

The role of various magnetic inter-chain couplings is investigated by numerical methods in doped frustrated quantum spin chains. A non-magnetic dopant introduced in a gapped spin chain releases a free spin-1/2 soliton. The formation of a local magnetic moment is analyzed in term of soliton confinement. A four-spin coupling which might originate from cyclic exchange is shown to produce such a confinement in contrast to transverse magnetic exchange. Dopants on different chains experience an effective space-extended non-frustrating pairwise spin interaction.

Dates et versions

hal-00131599 , version 1 (16-02-2007)

Identifiants

Citer

Nicolas Laflorencie, Didier Poilblanc. Doped coupled frustrated spin-1/2 chains with four-spin exchange. Physical Review Letters, 2003, 90 (15), pp.157202. ⟨10.1103/PhysRevLett.90.157202⟩. ⟨hal-00131599⟩
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